Recently, a team led by Academician Zhuang Songlin and Professor Zhang Dawei from the School of Optoelectronic Information and Computer Engineering at Shanghai University of Technology achieved a breakthrough in microcavity laser encryption. The research team achieved four-dimensional optical encryption by constructing an elliptical OAM micro-laser array. Combined with the non-clonable function (PUF) of microcavity lasers, the proposed encryption scheme holds significant potential for applications such as high-security information storage and anti-counterfeiting. The related work, titled "Controlling Elliptical Photon Orbits in Micro-Lasers to Achieve High-Dimensional Encryption," was published in Laser Photonics Recensioner . Den första författaren till tidningen är Mao Lingge, en masterstudent från School of Optoelectronics, och motsvarande författare är Qiao Zhen, en utmärkt professor från samma skola .}
Optical encryption technology, with its unique advantages such as multiple encoding dimensions, high parallelism, and large-capacity storage, holds significant application value in the field of information security. As the number of optical encoding dimensions increases, the complexity of information encryption also significantly increases. Therefore, multi-dimensional optical encryption is a key technology for enhancing information storage security. Microcavity lasers, as a new generation of optical encryption devices, emit laser light with multi-dimensional optical characteristics, thereby providing an innovative platform for integrated multi-dimensional optical encryption devices. Additionally, laser characteristics are highly sensitive to even minor changes in the microcavity, and microcavity lasers Har i sig icke-klorbar funktionalitet (PUF) och lägger till ytterligare ett lager av säkerhet för informationsskydd .
Schematiskt diagram över elliptiska OAM-mikrolasrar för flerdimensionell optisk kryptering
Among various encoding dimensions, the control of photon orbital angular momentum (OAM) has garnered significant attention due to its ability to expand encryption dimensions. As multiplexing dimensions such as wavelength and polarization approach saturation, exploring innovative mode division multiplexing (MDM) methods for OAM can effectively increase the number of encryption dimensions in optical Kryptering . På grund av bristen på exakt kontroll över OAM -lägen förblir emellertid krypteringsdimensionerna för optisk kryptering baserad på mikrokavitetslasrar på en relativt låg nivå .
To overcome this limitation, researchers created an array of dielectric elliptical rings within a Fabry-Pérot microcavity, enabling the generation of elliptical OAM mode arrays and multi-dimensional encryption. The encryption dimensions include the angular order l, radial order p, ellipticity ε, and major axis direction θ of elliptical OAM lägen . Dessutom, på grund av den höga känsligheten i kaviteten för den motsvarande fotoniska potentialen, uppvisar varje elliptisk fotonisk orbital vinkelmomentläge icke-klonbara lasermönster . den multidimensionella kodning och icke-klänningsfunktionalitet av det elliptoniska fotoniska angulery-momentumet momentumaly momentumaly momenty momenty momenty momenty momenty lasery coartal coperery coperery copery copery pearery copery pearion ptapy System .
Compared to traditional photon orbital angular momentum encryption schemes that only utilize angular order as the encoding dimension, this method breaks the central symmetry of the photon orbit, constructing a four-dimensional parameter space optical encryption system. Leveraging the continuous tunability of these geometric parameters and the non-replicability of lasers, this method holds significant application potential in Informationskryptering med stor kapacitet och anti-förfalskning .
